using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;
using FastReport.Utils;

namespace FastReport.Table
{
    /// <summary>
    /// Represents a collection of <see cref="TableColumn"/> objects.
    /// </summary>
    public class TableColumnCollection : FRCollectionBase
    {
        /// <summary>
        /// Gets a column with specified index.
        /// </summary>
        /// <param name="index">Index of a column.</param>
        /// <returns>The column with specified index.</returns>
        public TableColumn this[int index]
        {
            get
            {
                TableColumn column = List[index] as TableColumn;
                column.SetIndex(index);
                return column;
            }
        }

        /// <inheritdoc/>
        protected override void OnInsert(int index, object value)
        {
            base.OnInsert(index, value);
            if (Owner != null)
                (Owner as TableBase).CorrectSpansOnColumnChange(index, 1);
        }

        /// <inheritdoc/>
        protected override void OnRemove(int index, object value)
        {
            base.OnRemove(index, value);
            if (Owner != null)
                (Owner as TableBase).CorrectSpansOnColumnChange(index, -1);
        }

        internal TableColumnCollection(Base owner) : base(owner)
        {
        }
    }
}
